# Alert Providers

Chargeback alerts are powered by Visa and Mastercard. ChargebackStop is an authorized, direct reseller of alert data from both card networks. We handle onboarding, management, and automation so you get full value from alerts without extra overhead.

**Ethoca Alerts (Mastercard)** covers roughly 95% of Mastercard-related chargebacks and about 40% of Visa-related chargebacks. [Learn more here.](/chargeback-alerts/ethoca-alerts.md)

**Verifi RDR (Visa)** covers roughly 95% of Visa-related chargebacks. [Learn more here.](/chargeback-alerts/verifi-rdr.md)

When both programs are enabled together, merchants typically see up to 95%\* dispute prevention coverage across all Visa and Mastercard transactions.

{% hint style="info" %}
**A note on coverage estimates:** The 95% figure reflects what we typically see across our customer portfolio. Your actual coverage depends on issuer spread and cardholder regions. Contact our sales or support team with details about your setup and volume, we can give you a specific estimate before you onboard.
{% endhint %}

### What about Amex & Discover?

Both alert providers offer some coverage for Amex and Discover disputes, but availability depends on your payment processor setup. Reach out to sales or support to confirm what's possible for your configuration.


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